Service manual

DV-L70S
DV-L70BL
DV-L70W
34
9-12. IC702 BA5933FP-1
Pin No. Terminal name Operation function Pin No. Terminal name Operation function
1 STBY Stand-by mode selector switch 13 OP_OUT Operation amplifier output
2 OUT+ CH1 positive output terminal 14 OP_IN(-) Operation amplifier negative input
3 OUT- CH1 negative output terminal 15 OP_IN(+) Operation amplifier positive input
4 GND GND 16 IN2' CH2 gain adjustment input terminal
5 VCC VCC 17 IN2 CH2 gain fixed input terminal
6 MUTE Mute terminal 18 IN3' CH3 gain adjustment input terminal
7 GND Substrate GND 19 IN3 CH3 gain fixed input terminal
8 REG_OUT Constant voltage output 20 VCC VCC
(collector of external Tr) 21 GND GND
9 REG_B Connected to the base of external Tr 22 OUT3- CH3 negative output terminal
10 BIAS Bias input terminal 23 OUT3+ CH3 positive output terminal
11 IN1' CH1 gain adjustment input terminal 24 OUT2- CH2 negative output terminal
12 IN1 CH1 gain fixed input terminal 25 OUT2+ CH2 positive output terminal
* The negative/positive pole of the output terminal is the polarity against the input.
• Block Diagram
LEVEL SHIFT
LEVEL SHIFT
LEVEL SHIFT
T.S.D.
x2
x2x2x2x2
x2
+ -
+ -
+ -
+ -
+ -
25 24 23 22 21 20 19 18 17 16 15 14
123456 89710111213
STBY MUTE
8.3KΩ
8.3KΩ
8.3KΩ
8.3KΩ 8.3KΩ
10KΩ10KΩ
8.3KΩ
REGULATOR
OP-AMP
T.S.D ; Thermal shutdown
Unit of resistance is [Ω].